Principal Celestia always has wings in her dreams. So when a magical clash in front of her school sets her phantom wings to itching, her life turns upside down. And she hasn't even heard about Equestria yet.
When the portal to Equestria is destroyed, Sunset Shimmer's planeswalker spark awakens in a moment of despair. Upon arriving in a world where souls are transformed by nightfall, the very foundation of Sunset's identity is broken in two.
She was a unicorn on the run. She needed somewhere to hide, somewhere quiet and boring. The tourist pamphlet was out of date but the place sounded ideal... Ponyville